None of the Mike's "disadvantages" is a deal breaker for me; they're more things to be Aware of than BEware of.
As you say, it's sooo darn fast and convenient. (My entire installation is about 30 GB, and even when I delete my Checkpoint snapshot, FVC takes no longer than a minute or two to clone it.)
I hadn't noticed that Mike's doc is ten months old. Maybe FVC's still being an option is a positive sign?
